pypa/pip — pull request #378 by ulope (2011-10-31 17:33:08+00:00)
Title: Feature addition for issue #341

This patch adds the functionality proposed in #341.

In contrast to the proposal I chose to use "-c / --changed" as the option name as it seemed more natural.

I also slightly updated the "## The following requirements were added by pip --freeze" message by adding the current date to the end.